﻿using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace ConsoleApp1
{
    class tuxing
    {
        public double tx(double r)
        {
            return r * r * 3.14;
        }
        public int tx(int a,int b)
        {
            return a * b;
        }
    }
}
